Derren said:
No, the fighter does what he is supposed to do, just without mark which he can use on a different enemy, while the paladin uses his at will mark and ranged basic attacks to deal more damage to a monster than what a real striker can do with encounter or even daily abilities.
I think you're mistaken. This combination, when the pally can pull it off, can deal a respectable amount of damage. It isn't on par with striker encounter or per day abilities.
Firstly, Dexterity isn't a primary or secondary ability score for paladins. It is tertiary. So, going with the longbow using pally you've put forward... let's assume that you nerf your primary scores a little to get a decent dexterity score of 14 (the DDXP halfling pally had a 12 dexterity, despite that halflings get a +2 to dexterity). Any more than this and you can likely forget about being even reasonably effective when you are forced into melee.
A longbow deals 1d10+Dex damage (we'll assume that he is a human even though this increases the price that he paid for his 14 dex a bit, since it's simpler than making up stats for a shortbow). We'll even grant the pally the 16 Charisma that the halfling pally has (he'll have to pay for those points from Str, Wis or Con, but let's ignore that for the moment).
For simplicities sake, lets assume a base 50% chance to hit the target with +0 attack.
Your pally has a +4 to hit with his Longbow (we'll assume he took the feat to be proficient).
So he has Longbow +4 to hit [1d10+2 dmg = avg 7.5 dmg] plus (assuming all goes well) an automatic 8 radiant damage, for a total average 15.5 damage each round (assuming he hits with his ranged attack). His divine challenge also applies a -2 to attack to the target.
His accuracy is 70% (100% for DivC) for an average damage of 13.25 and a -2 to attack.
The DDXP Ranger's at-will ability Hunter's Quarry grants him +1d8 dmg (4.5 avg dmg)vs his quarry.
His at-will Careful Attack has a +10 to hit and deals [1d10+4 dmg = 9.5 avg damage]
His total average damage with his at will abilities is 14 dmg, 1.5 dmg less than the pally but with a better chance to hit (albeit, even if the pally misses, he has a guaranteed 8 dmg so long as he can keep the mark on the target).
This attack has 95% accuracy for 13.3 avg dmg.
The Ranger's daily power is Split the Tree +6 to hit two different targets (roll two attack rolls and take the better of the two). It deals 2d10+4 damage (avg 15 dmg) to each target, plus the hunter's quarry bonus to one of them. One takes an average of 19.5 dmg and the other takes avg 15 dmg, for a total of 34.5 damage. The attack is also highly accurate.
The accuracy is 80% with a reroll, for 95% accuracy for 32.775 avg dmg.
The ranger's at will is pretty much in the same ballpark, MAYBE slightly weaker.
The ranger's daily is more than twice the amount of damage.
This is given that I have been fairly generous with the ranged pally build.
I daresay without evidence to back up your claim that this pally combo can out damage striker daily powers, I must disagree.